Abstract View
Comparison of Oxidative Potential of Fine Particles between Urban and Rural Sites
SEUNGHYE LEE, Ma. Cristine Faye Denna, Minhan Park, Jiho Jang, Joonwoo Kim, Kihong Park, Gwangju Institute of Science and Technology
Abstract Number: 586
Working Group: Health-Related Aerosols
Abstract
The ambient fine particulate matter (PM2.5) was reported to cause various adverse health effects. Oxidative potential (OP), the ability of particles to induce oxidative stress by introducing redox-active components, catalytically producing reactive oxygen species (ROS), and reducing antioxidants in the body can be considered as a measure of PM2.5 potential toxicity. The ambient PM2.5 samples were collected at three different sites (urban Beijing (China) and Gwangju (Korea) in the winter of 2018, 2019, 2020 and summer of 2019 and rural Gimje (Korea) in the summer of 2020 and winter of 2021). The PM2.5 OP was determined by using the dithiothreitol (DTT) assay. Both volume (OP-DTTv) and mass (OP-DTTm) normalized OP were higher at urban sites than the rural site (p-value < 0.05). At all sites, the higher OP-DTTv was observed in the winter compared to the summer. Chemical composition data for PM2.5 will be used to investigate major factors affecting the OP at sites.